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Great Central class 9Q
The class 9Q of the Great Central was a 4-6-0 mixed traffic locomotive designed by John Robinson. It was based on the class 9P “Lord Faringdon” express locomotive, but had smaller drivers with a diameter of five feet ...
| Great Central class 9QRemove | |
|---|---|
| Variant | Standard |
| Built | 1921-1924 |
| Manufacturers | Gorton;Vulcan Foundry;Beyer, Peacock & Co. |
| Wheel arrangement | 2C |
| Gauge | 1435 mm |
| Length | 19202 mm |
| Service mass | 80776 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Built | 1921-1924 |
| Manufacturers | Gorton, Vulcan Foundry, Beyer, Peacock & Co. |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,435 mm |
Dimensions and weights
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Length | 19.20 m |
| Wheelbase | 8.61 m |
| Total wheelbase | 16.09 m |
| Service mass | 80.8 t |
| Adhesion mass | 59.4 t |
| Total mass | 129.9 t |
| Rigid wheelbase | 4.39 m |
| Axle load | 19.8 t |
| Water capacity | 18,185 l |
| Fuel capacity | 7.1 t (coal) |
Boiler
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Grate area | 2.415 m² |
| Firebox surface | 15.143 m² |
| Tube heating surface | 174.751 m² |
| Evaporative heating surface | 189.894 m² |
| Superheater surface | 31.866 m² |
| Total heating surface | 221.8 m² |
Power plant
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Driver diameter | 1,727 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | four, 406 x 660 mm |
Power
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Power source | steam |
| Estimated power | 1,007 kW (1,369 PS) |
| Starting effort | 133.2 kN |
Calculated values
| Property | Great Central class 9Q Standard Remove |
|---|---|
| Factor of adhesion | 1 : 4.38 |
| Optimal speed | 47 km/h |
| Power-to-weight ratio | 12.5 kW/t |
| Heating Surface Equivalent | 329.3 m² |
| Cylinder volume/HSE | 1 : 1,040.44 |
| Adhesive weight/Total | 1 : 1.36 |
| Tractive force/Heating surface | 1 : 12.55 |
| Grate area/Heating surface | 1 : 91.83 |
| Firebox/Tube surface | 1 : 11.54 |
| Total/Superheater | 1 : 5.96 |
